Rexhal,
I also bought a used coach, fortunately it came with all the manuals. It also came with the data sheet that has a listing of all the various components by Manufacturer, Model, SN.
I have spent a lot of time developing a library that has info on all these components to include installation, maintenance, and parts.
I would suggest you contact Monaco and request a copy of your data sheet, I would also request a PDF copy of all the wiring schematics. You can do this by going to this site and filling out a form. I would also suggest you register yourself as the new owner of the coach.
Contact Monaco Coach
Good luck with the new coach.